<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <form method="post">
        <input type="text" name='title'><br/>
        <input type="text" name='code'>
        <img src="{|U:'code'}" style="cursor:pointer" onclick="this.src='{|U:'code'}&_'+Math.random()"><br/>
        <input type="submit">
    </form>
</body>
</html>